Miranda Miller is wearing the Golden Fang Tee from HX by Future Heretics which was sold at Hot Topic but is now sold out. I’m not sure about her exact pink shorts, but here are a bunch of similar pairs:

All four members of the girl band Cherri Bomb wore t-shirts from Monster Aesthetics during their set at Warped Tour in Long Island. Monster Aesthetics has a booth at Warped so you can buy any of these tops in person if you are going to the remaining dates.